I still say that my favorite big-screen Lex Luthor is Robert Vaughn in Superman III
. Okay, he wasn't actually playing a character named Lex Luthor, but his Ross Webster was a far more convincing supervillain than Hackman's Luthor was allowed to be, with a much larger organization, better resources, and more far-reaching and effective schemes. And he was a forerunner of the corporate-magnate Luthor introduced a few years later in the comics. Don't get me wrong, Hackman did a great job with what he had, but the character he was saddled with playing was a feeble excuse for Lex Luthor.